Changeable lens and filter structure for copy cameras



May 6, 1947. 2,420,023

GHANGEABLE LENS AND FILTER STRUCTURE 'FOR cow CAMERAS s. N. WEKEMAN 7 Filed April 29, 1943 15 Sheets$heet 1 RM Mm m a N R 5% v5 T N Y I N B M M M May 6, 1947. s. N. WEKEMAN CHANGEABLE LENS AND FILTER STRUCTURE FOR COPY CAMERAS Filed April 29, 1943 15 Sheets-Sheet 2 BY ww w T ORNEYS May 6, 1947, s. N. WEKEMAN CHANGEABLE LENS AND FILTER STRUCTURE FOR' COPY CAMERAS Filed April 29, 1943 15 Sheets-Sheet 3 uIF May 6, 1947. 5 M N 2,420,023

CHANGEABLE LENS AND FILTER STRUCTURE FOR COPY CAMERAS Filed April 29, 1943 15 Sheets-Sheet ,4

. ill/I114 INVENTOR STEP/#73 IV Wf/ff/V/WV ATTQRNEYS 'i I II I I 'l I I I 0 v 6 I l I v V RM w m 3 NM R w: m NmW MM 7 1 k m m M WW MU S. N. WEKEMAN CQZ'IlZZlZIGJ Filed April 29, 1943 CHANGEABLE LENS AND FILTER STRUCTURE FOR CORY CAMERAS May 6, 1947.

May 6, 1947. s; N. WEKEMAN CHANGEABLE LENS AND FILTER STRUCTURE FOR COPY CAMERAS Filed April 29, 1943 15 Sheets-Sheet 6 INVT STPH5N N WINE/VAN ATTORNEYS May 6, 1947. s; N. WEKEMAN CHANGEABLE LENS AND FILTER STRUCTURE FOR COPY CAMERAS Filed April 29, 1945 TATE? l5 Sheets-Sheet '7 Tifi. 1 7

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AT ORNEY May 6, 1947. s. N. WEKEMAN CHANGEABLE LENS AND FILTER STRUCTURE FOR COPY CAMERAS Filed April 29, 1943 15 Sheets-Sheet 8 3: MW MMHUF .7 5. r

N mm m W N m H P m n 5 V BY W MQ M ATTORNEYS 1947. I s. N. WEKEMAN 2,420,023

CHANGEABLE LENS AND FILTER STRUCTURE FOR COPY CAMERAS Filed April 29, 1943 15 Sheets-Sheet 9 i mlllllllll H I" I I N V x 1: w 1 N l 1 g l M I w i Q N s 1 a N I l I N k} AT ORNEYS S. N. WEKEMAN CHANGEABLE LENS AND FILTER STRUCTURE FOR COPY CAMERAS May 6, 1947.

Filed April 29, 19415 15 Sheets-Sheet 1O iNVENTOR Rx \MN m n RN 1 l IN] 1 Q Nam mun mumx mkx BY W,% M

TORNEYS y 6, 1947- s. N. WEKEMAN 2,420,023

CHANGEABLE LENS AND FILTER STRUCTURE FOR COPY CAMERAS Filed April 29, 1943 15 Sheets-Sheet 11 /e/ E 5' I a .12- i:

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H 207 II! I I I57 11"? J 1J6 to Z067 Z09 INVENTOR .1 1.1 TEPHEN N H [KE/VA/V BY W MwMJ ATTORNEYS May 6, 1947. s. N. WEKEMAN CHANGEABLE LENS AND FILTER STRUCTURE FOR COPY CAMERAS Filed April 29, 1943 15 Sheets-Sheet 12 INVENTOR ATTO NEYS 15 SheetsSheet 13 BY w aagaw ATTORNEYS y 6, 1947- s. N. WEKEMAN CHANGEABLE LENS AND FILTER STRUCTURE FOR COPY CAMERAS Filed April 29, 1945 A m 5 NW N w M P H 5 knQ N May 6, 1947. s. N. WEKEMAN GHANGEABLE LENS AND FILTER STRUCTURE FOR COPY CAMERAS Filed April 29, 1943 15 Sheets-Sheet 14 INVENTOR STE/CHEN lVf/ff/VA/V BY 06%, kw

ATTORNEYS May 6, 1947. s. N. WEKEMAN CHANGEABLE LENS AND FILTER STRUCTURE FOR COPY CAMERAS Filed April 29, 1943 15 Sheets-Sheet l5 R O T N E V m FM EYS Patented May 6, 1947 CHANGEABLE LENS AND FILTER STRUC- TUBE FOR COPY CANIERAS Stephen N. Wekeman, Saddle River Township, Bergen County, N. 1., assignor to Sun Chemical Corporation, a corporation of Delaware Application April 29, 1943, Serial No. 485,004

4 Claims. 1

My invention relates to cameras.

In accordance with my invention, a. novel arrangement is provided in a camera. for controlling movement of a lens-carrying slide by operation of mechanism supported by the carriage for the light-sensitive member. I

Subect matter described but not claimed herein forms the subject matter of my copending applications Serial No. 651,212, filed March 1, 1946, for "Copy holder, and Serial No. 651,213, filed March 1, 1946, for "Suction housing.

Various other objects, advantages and features oi my invention will become apparent from the following detailed description,

My invention resides in the camera, control mechanism, arrangements and combinations of the character hereinafter described and claimed.

For an understanding of my invention and for an illustration of one of the forms thereof, reference is to be had to the accompanying drawings, in which:

Figure 1 is a perspective view showing the camera of my invention;

Fig. 2 is a perspective vew showing a part of the camera illustrated in Fig, 1;

Fig; 3 is an elevational view, partly in section, showing the camera lens board together with some of the optical elements carried thereby;

- Fig. 4 is a vertical sectional view, partly in elevation, taken substantially on the line 4-4 of Fig. 3 looking in the direction 01' the arrows;

Fig. 5 is a vertical sectional view, partly in elevation, taken on the line 5-5 of Fig. 3 looking in the direction of the arrows;

Fig. 6 is an elevational view, partly in section, showing a detailed feature of the invention;

Fig. '1 is an elevational view showing the front of the suction housing;

Fig. 8 is a detailed sectional view taken on the line 8-8 of Fig. 7 looking in the direction of the arrows;

Fig. 8a is an enlarged, vertical sectional view taken on the line liar-8a of Fig. 7 looking in the direction of the arrows;

Fig. 8b is an enlarged, horizontal sectional View taken on the line 8b-8b of Fig. '1 looking in the direction of the arrows;

F g. 9 is a plan view of the suction housing;

Fig. 10 is a rear elevational view of the suction housing carriage;

Fig, 11 is a side elevational view of the carriage shown in Fig. 10;

Fig, 12 is an enlarged vertical sectional view. partly in elevation, showing the drive mechanism for the carriage illustrated in Figs, 10 and 11;

Fig. 13 is an elevational view showing the Vernier mechanism of my invention;

Fig. 14 is a vertical sectional view, partly in elevation, taken on the line I l-l4 0! Fig, 13 looking in the direction of the arrows;

Fig. 15 is an elevational view showing the rear oi the copy holder carriage;

Fig. 16 is a side elevational view of the carriage shown in Fig. 15;

Fig. 17 is a, plan view of the carriage shown in Figs. 15 and 16;

Fig. 18 is an enlarged elevatlonal view, partly in section, showing a part of the drive mechanism for the copy holder carriage;

Fig. 19 is an enlarged, vertical sectional view, partly in elevation, showing another part oi the drive mechanism for the copy holder carriage;

Fig. 20 is a horizontal sectional view, partly in plan, taken on the line 2020 of Fig. 11 looking in the direction of the arrows;

Fig. 21 is an enlarged horizontal sectional view taken on the line 2i-2l of Fig. 10 looking in the direction of the arrows;

Fig. 22 is an enlarged vertical sectional view, partly in elevation, taken on the line 22-22 of Fig. 1:

Fig. 23 is an enlarged sectional view, partly in elevation, taken substantially on the line 23-23 of Fig. 11 looking in the direction of the arrows;

Fig. 24 is a plan view, partly in section, showing part oi the drive mechanism of the invention;

Fig. 25 is an enlarged vertical sectional view, partly in elevation, showing a part of the camera. track mechanism;

Fig. 26 is a horizontal sectional view, partly in plan, taken substantially on the line 26-46 of Fig. 1 looking in the direction of the arrows;

Fig. 27 is an enlarged sectional view showing a detailed feature of the invention;

Fig. 28 is a vertical sectional view, partly in elevation, taken substantially on the line 28-28 of Fig. 1 looking in the direction of the arrows;

Fig. 29 is an enlarged elevational view showing a feature of the invention;

Fig. 30 is a. horizontal sectional view, partly in plan, taken on the line 30-30 of Fig. 29 looking in the direction of the arrows; and

Fig. 31 is a vertical sectional view, partly in elevation, taken on the line 3 l-3l of Fig. 29 looking in the direction of the arrows.

Referring to Figs. 1, 2 and 25, I have shown a base B which comprises a pair of parallel tracks I, I supported by cross ties 2 which, as shown, carry adjusting screws 3 engageable with the floor 9 M 1181 pporting surface and being utilizable for leveling purposes. The tracks I, l are braced by tie rods 4 each of which carries a spacing sleeve 5, Fig. 25. Each of the tracks I has associated therewith a horizontal rack 6 which is secured thereto by screws 7. As indicated in Figs. 1 and 25, adjacent sections of each of the tracks I are secured together by plates in which are bolted in position in any suitable manner.

Referring particularly to Figs. 3 and 4, the tracks I, I are shown as having a, pair of members or standards 8, 8 such as angle irons secured thereto by bolts 9, the standards 8. -8 extending vertically in parallel relation and being braced by the respective inclined members I connected thereto and to the tracks 'I aiid Lrespeetivsly. Extending horizontally between the tracks 'I, l and suitably secured to the lower ends of the standards 8, 8 on one side thereof is a.plate H utilizable as hereinafter described. Secured. by screws l2, to the other side of the standards 8,8 is a shield plate 13 to Whichfby screws II, a pair of fastening member's 15, are secured, these fastening members being secured to the outside of the respectivesta'n'dards B, 8.

Secured in suitable manner to the sta'nlziarcls B, 8 is a frame plate It which, at the respective opposite sides thereof, has suitably'secured thereto the vertical side tracks l1, 1-! which guide a frame plate 18 for vertical movement. The frame plate l8 has suitably secured thereto the respective, horizontal upper and lower tracks [9, I9 which guide a plate '20 for horizontal movement. The plate 20 carries upper and lower horlz'ontal tracks 2|, 2| which guide a supporting slide '22 for horizontal movement.

As indicated in Fig. '4, each of the plates iii, '[8 and 20 has an opening which eiitends horizontally between the'standai'ds a sna u, these openi'ng's being alined with each other andwith an opening I30. formed in the shieldplate l3, Fig. "1. The slide '22, in the example shown, ha'sffive horizontally aiin'ed openings which are aimed individually with the aforesaid openings of the plates 13, I B and 20. The "four slide openings at the left, Fig. 3, "are provided for four objective lenses LI, L2, L3 and L4 having different focal lengths, respectively, each lens being secured in fixed position by 'a-housing'23 suitably secured'tc the slide 22.

The slide opening at the right, Fig. 3, is substantially larger than are the other openings thereof. At the lower side of this opening, there is a horizontal bracket 24 while, along the opposite respective sides thereof, side guides 25 are disposed, a top horizontal guide 25 being horizontally disposed at the top of said opening. A cone 21 has a bottom flange which fits into the bracket N and within the guides 25, 25 and 25, the cone 2! being secured in position by latches 28 pivoted to the top guide -26. 'The front wall of thecone 2'1 is provided with an opening in which :an 'objective lens, not shown, is secured.

As indicated in 5, the rear surface of the slide 22 carries an arrangement corresponding lected notch to releasably retain the slide 2? and til) thereby hold a selected objective lens in projecting position.

Secured to the aforesaid plate 20 is the base of a bracket arm 3| having an upstanding post Mo on which a sleeve 32 is loosely mounted for free oscillatory movement, the sleeve 32 comprising a base are seating on a-iian'ged :surfa'oe of the post fie. Extending from thesleeve 321s ahorizontal arm 32b, Fig. 3, which terminates in an enlarged section 320 having a pin 33, Fig. 4, projecting horizontally therefrom. Freely rotatable on the pin 83 1s a disk 34 having therein a plurality, five in the example shown, of apertures 35 adapted. in suitable manner, to have color filters F of dinerem Values mounted therein, respectively, said apertures '35 being circularly spaced in suitable -relation around the pin 33 as an axis. The aforesaid enlarged section 320 of the sleeve arm 32a comprises a horizontal passage which faces the base of the disk 34 and which has disposed therein a spring-prssed ball 3$,Fig. 4, adapted to cooperate with 'fi'vedetents formed fn 'said base of the 'disk34 and eircularly'spaced'around the pin 83 in ccrrespondencewith the circularspacing or the apertures.

As shown in Fig. 4, a'light'shield 31 =is-s'u'pported in suitable manner on the upper surface or the sleeve arm 32a.

Referring to Fig. *1, thebracket arm 3!, below the sleeve base 320, comprises an upwardly dpe'nin passage in which is seated =a spring press'ed ball 38'ad'aptedto cooperate with a detent formed in the lower surface ofsaid 's'leevebase 32a.

The aforesaid sleeve arm 32a. 'is 'of the proper length for the pin 38 'car'ried thereby to be 'po sitione'd vertically below the'axis of the projectin'g light beam. I This position of the sleeve arm 32a is illustrated in Fig. 3 and, when thus p0- sitione'd, the spring-pressed ball 38 cooperates with its detent to reieas'ably retain said sleeve arm in the position illustrated. It 'will be understood that, against the pressure exerted by the ball 38, the sleeve 32 'andits arm 32a'may be swung on the'post 3l'a'to'p'lace the'desci-ibed cblor filter arrangement in a non-operative position.

With an arrangement of the character "described. "it will be understood that the disk 34, when positioned as shown in Fig. 3, may be rotated about the pin 83 as an axis to bring the center of any color filter F into the axis of the projecting light beam. The detents with which the spring-pressed ball 85 is cooperative are so positioned that the disk 34 is releasably held to retain any selected color filter in its proper projecting position.

Referring to Figs, 10, 11 and '12, the aforesaid tracks i, l are shown as supporting a frame formed from longitudinally extending members disposed in parallel relation and transverse members 46 likewise disposed in parallel relation, these members 45 and 46 being suitably secured to each other in frame-forming relation so as to form a movable base'for a carriage 'C utiliz'able as hereinafter described. The rear member 46, at each end thereof, has secured thereto in suitable manner a bearing structure 41, these hearing structures 41 being alined transversely and each of them supporting a horizontal stud on which a roller 48 is freely rotatable. The front member 46, at each end thereof, has secured thereto in suitable manner a bearing structure d9, these bearing structures 49 being transversely allned and each of them supporting a horizontal stud on which a roller 50 is freely rotatable.

Disposed in front of the carriage C is a platag zo form formed, in the example shown. :frorna pair of transversely extending onembers suitably bolted together, one end of this platform being supported by the bearin structures ;49 preferably in pivotal fashion as indicated at 5,2. Secured to each front corner of the aforesaid platform is arbearing structure -53, these bearing structures 53 being transversely alined and each of them supporting a horizontal stud on which arollerfid is freely rotatable.

In view of the foregoing description, ;it will be understood that one set of rollers 48,-3.5!) and 54 engage one of the tracks i whereas the other set of rollers .48, 5D and {A engage the other track 1. As indicated in Fig, 10, the set of rollers ,at the left engage the adjacent track I imnon-grooved relation whereas the set oizrollers at the right are grooved for .the reception oLthe adjacenttrack 12,

Preferably, in accordance with the invention,

the longitudinallyextending members have bolted or otherwise secured theretowone or more transversely extending platform-forming membars 55.

Upstanding from andsecured to the aforesaid movable base for the carriage C are a pair of vertical members or standardsifi, such asangle irons, these standards 56 being braced by the inclined and horizontal members 5:].

As shown in Figs. 10, 11, 1-2 and 23,.one of the aforesaid standards 56 carries a-horizontally extending bracket 58 in ,whichls iournalled-a shaft 59 having an operating hand wheel Slat one end thereof. Suitably secured .tothe otherend of the shaft'fiil -is a sprocket wheel :GI disposed in the same vertical plane .as .an idler sprocket wheel '62 .and a driven sprocket wheeljS. The sprocket wheeLSZ is journalled-on a-stub,-shaft.-6.4 carried-by abracket= secured to the adjacent standard .56. The sprocket wheel .63 islsecured itO a -.horizontal .shaft-BB journalled in bearing brackets :61 secured .to.and depending fromnthat transversememher 4,6 which :is disposed at ,the :front of the movable base for the,carriagelC.

.carriedtby the sprocket wheels:6l,.52 and r6315 an endless-sprocket chaimfifl serving to transmit power generated at the hand wheel .511 til-the driven sprocket wheelrfiil,

Adjacent each of its ends, theshaft SB-has secured thereto agear wheel as 9, thesegear-wheels i ;being ,disposed immediately .aboveand .-i n meshingirelationgvith; therespective racksfi. .Asshown -in -Fig. 12, itls desirable for eachof the-bearing brackets-i1 tohave anvangle members'llhsecured thereto; in. suitable manner, these anglamembers .0 engaging the-bottomrsurfaces of the respective racks 5 to thereby maintain the gear yvheelsBB in proper meshing relation withthe respective racks 6.

;As shown in fig. 12, the bearing bracket fil ,toward :the right, :Fig. -10, is provl ded with a vertical passage extending upwardly from the shaft 56 =forthe .reception of the reduced-lower end of a rod ll which extends vertically to approximately'the height of the handwheelfifl and there ,terminates in an actuating ,wheel- 72, the rod -l l being threaded in'suitablemanner tosome fixed. part of-the mechanism, for example, to a nut -1 carried bythe adjacent -.hor izontal bracingmember 51.

With the rod -l elevatedtosuchextent that the lower end thereof is above the shafttfi, it will he understood that an operator mayrotate the handwheehfifl to thereby transmit rotary movement to the sprocket .Wheel 53, through the meeban qe s eneei en pmer si $3 she so the sprocket wheel BI and the sprocket chain ill. a resnlt rotatable movement of the shaft 855 and gear wheelsfiQ is produced. The gear wheels mesh with the respective racks B and, therefore. responsive to movement of said hand wheel til, the carriage C is moved in one direction or another .along the tracks .I, I. In case it becomes desirable to positively retain the carriage .C in any selected position to which it-has been moved, the rod .1! maybe rotated to move the reduced end thereof into locking engagement with the shaft 56 and thereby prevent transiatorymov'ement of the carriage C.

Refer-ring to Figs.- 10, 11,20 an d 2 l, onestandard {5}; is shownas carrying a bracket (4 terminating in a tubular bearing 15 which supports outer and inner sleeves 15,11 together .with an inner-shaft la. saidsleeves and shaft beingindependentlymovable-withrespect to each other-on needle bearings as shown in Eig. '20. Qperatively a soci t i -il sl ve 1. 1 an sh tatone end thereof are therespective actuating wheels or members 15,80 and Bi. Attheir other lands, the sleeves ,1G, 11 and shaft 18 carry the respective sprocket wheels-32, 83 and .84.

Referring particularly-to Figs. 10, 21 and 22, the aforesaid bearing liis shown as having a pair of spaced rods ;fl 8 6 projecting;longitudinally therefrom. A ring 31 comprises a slot which receivesthe rod 35, Fig. 2 2, and-rings-fiflvlii comprise slots which, respectively, receive-the rod 85, Fi -2 these ms #1- 2 .3 4" b 15 19 11 carried by the hubs of ,the respective sprocket .wheels 313.314 and 8}. Figs. -2,0 and-21, 'Each of said rings comprisesaboss90 through which is threaded; screwrgl the screws. 9 I being adapted to bemoved into binding relation as regards the hubs of said respective sprocketwheels.

"The sprocket wheels $2, 83 and .84 haveasso- .cinted ,th erewith the respective. endless sprocket chainsflfl, Q5 and. 96,-Fi gs.- 1 0 and 11, which engage .idler sprocket wheels ilia, {a and 96a, respectively, the sprocket wheels last noted being gnounted onthe upper surface ofoneof the hereinbeforadescrlbemmembers 4B. v Secured to the lower. surface of saldrnember 4 5; is a bracket 81, Figs. l0 and 24, which comprises three bearings ellllb, 9 5b.and,5 .l5b, 1 ig. ;2 4, disposed atthe same ,horizontailevel. J'reelylrotatableln the aforesaid bearings are the respective. bushings 34c, 95c and A60 having secured thereto -the sprocket ,wheels sfid fl jd.and;9d, respectively. Openings are.provid ed= in thamemberfijdor the fre passa ge.the.rethrough of bothspans of ,each of the aforesaid sprocket .chains gd. '95, and 9B which coact, respectively, with the driven .sprocket vhee s dw'l d addl F -.2 Theopemion of,the mechanism ,referred toabove willbe subse u r ,d s i d Referring to El'g. -9, each of the hereinbeiore described standards 55 of the carriage 43 is shown ,as having secured etheretp a. plurali'ty .of angle ,memberslllil, Fig.1, which are secured insultable manner to a suctionhousing lll l comprising rear and front wallsJilZ andv l l3,-top and bottom walls 104 and -i05.together withsidexvalls LOB, Figs. '7. 8a, 8b, 9, l0 .andil, the aforesaid angle membersll Dflbeing secured tosaid rear..wal1 Hi2.

suction housing 10! is braced by a plurality of spaced vertical members hill and a.plurality .of spaced horizontal members I08, the outermost members; [[18, Fig- 'l, terminating short .9! therespectivehousing,side.walls1.95 and the rcspcctivememberslill closest. thereto, the inner 7 members I terminating short oi the respective members I01;

As shown in Fig. 7, the two central members I01 terminate equal distances above and below the central horizontal plane of the housing I0l. Horizontal upper and lower members I09 and H0 are disposed flushly against the respective upper and lower sections of the two central members I01, the members I00 and H0 extending beyond the two central members I01 and engaging those members I01 which are disposed at the opposite, respective sides of said central members I01. A also shown in Fig. 7, the upper and lower members I09 and H0 are braced by vertical members III and I12 disposed, respectively, at equal distances from the central vertical plane of the housing IOI..

It will be understood that the members I01, I08, I09, IIO, III and H2 are suitably secured, as by screws IOIa, in right-angular relation to the rear and front housing walls I02, I03 and that they span the space defined thereby. As indicated in Figs. I and 9, the members I00, 0, III and 2 are provided with openings II3. Further, as regards those vertical members I0'I which engage the members I09 and H0, the sections thereof between said members I09 and H0 are provided with similar openings II3, all of these openings II3 being utilizable as hereafter described.

Referring to Figs. 7 and 9, the rear housing wall I02 is shown as comprising an aperture II4 which receives a door II5 hinged to said wall I02 at H6 and lit, the door II5 being maintained in the plane of the wall I02 by smta'ble latch mechanism II'I, Fig. 7. Suitably secured to the door I I5 is the flanged end of a nozzle II8 to which is connected a. hose leading to any suitable vacuum pump, not shown. Disposed interiorly of the nozzle I I0 is a damper or control valve 9 having an operating shank to which is operatively reiated, in detachable manner, a rod I slidable in a bearing I2I secured to the rear housing wall I02.

In accordance with the invention, the front housing wall I03 is shown as comprising an aperture I22 correspondinggenerally and alined with the aforesaid aperture of the rear housing wall I02. Seated in a flanged surface of the wall I03 is a, member I25 on which images may be focused. The member I25 may be a sheet of ground glass although, preferably, it is a sheet of Vinylite. As herein shown, the peripheral portion of the member I25 is provided with a plurality of-spaced apertures through which extend the respective screws I26 utilizable for holding said member I25 in the plane of the wall I03.

As indicated in Fig. 7, the front wall I03 of the suction housing I M together with the member I25 are provided with closely spaced apertures which open from the atmosphere into the interior of said housing I0l.

Referring to Figs. 7 and 8a, the aforesaid top wall I04 of the housing I M, at each end thereof, has the horizontal arm of a T-member I21 secured thereto in suitable manner. The vertical arm of each angle member I21 is provided with an upwardly-opening vertical slot and these slots are alined horizontally for the reception, respectively, of a locked pin and a rotating pin which extend axially from opposite respective ends of a horizontal roller I28 upon which is wound a horizontal curtain I29 dapted to engage an idler roller I28a, this pin and roller arrangement to gether with the supports therefor corresponding generally with the usual window shade construc tion of similar nature.

As indicated in Fig; '7, the bottom wall I05 of the housing I0| carries a pin arrangement, hori zontal roller and horizontal curtain arrangement of the character described above. To parts of the lower curtain arrangement which correspond with the respective parts of the upper curtain arrangement, duplicate reference characters have been applied, respectively.

Referring to Figs. 7 and 80, each side wall I06, at the upper and lower ends thereof, has a T- member I32 secured thereto, these T-members being vertically and horizontally alined in pairs and each pair of said T-members I32 having a horizontal track I33 secured thereto in suitable manner. As shown in Fig. 8a, the T-member I32 comprises a horizontal arm I34 which carries a vertical stud I35 engaged, at its lower section, with the top wall I04. As indicated in Figs. 8a and 8b, the end of the arm I34 terminates in a bearing support.

It will be understood that a T-member I32 is disposed and mounted as described above at each corner of the suction housing IN. The arms I34 are alined in vertical pairs adjacent each side wall I05 and each pair of vertically alined arms I34 supports the respective ends of a vertical roller I35 having avertical curtain I31 wound thereon, the roller and curtain arrangement corresponding'generally with that hereinbefore described with reference to the rollers I28 and curtains I20.

In viewof the foregoing description, it will be understood that horizontal tracks I33 aredis'posed at and along the respective upper and lower ends of the suction housing IOI. Each of these tracks I33 carries a rack bar I38 'with which meshes a pinion I39 mounted in the manner hereinafter described. Coactable with each of the tracks I33 are a pair of slides" I40 and these are alined vertically in pairs. As shown particularly in Fig. 'I, each pair of the vertically alined slides I40 are connected together by a vertical rod MI and a vertical shaft I42, the upper and lower pinions I39 of each set of pinions being secured to the respective, shafts 'I42.'

As shown in Figs. 8 and 80, each of the rods I4I has aplurality of straps I43-secured thereto. At each side of the housing IOI, each set of straps I43 projects toward and forms bearings for the adjacent shaft I42. For each shaft I42, one of the straps I43 is threaded for the reception of a headed screw I44 which maybe moved into engagement with or released from the adjacent shaft I42 for a purpose hereinafter to be described."

Each of the vertical'curtains I31 hereinbefore described passes over an idler roller l36a, Fig. 8b, and each curtain I31 is suitably attached, at the respective corners thereof, to the adjacent upper and lower slides I40.

Reierring'to Figs. 1, 2, l5 and 16, the afore said tracks I, I are shown as supporting a frame formed from longitudinally extending members I50 disposed in parallel relation and transverse members I5I likewise disposed in parallel relation, these members I50 and I5I being suitably secured to each other in frame-forming relation so as to form a movable base for a carriage CI utilizable as hereinafter described. Secured to each corner of the frame formed by the aforesaid longitudinal and transverse members I50 and I5I is a bearing structure I52, these bearing structures being alined longitudinally and transversely in pairs. Each bearing structure I52 supports an outwardly extending horizontal stud and each stud freely supports a roller I53. As shown in Fig. 1, the pair of rollers I53 at the right engage the adjacent track I in grooved relation whereas the pair of rollers I53 at the left engage the adjacent track I in non-grooved relation.

Upstanding from and secured to the aforesaid base for the carriage CI are a pair of vertical members or standards I54, such as angle irons, these standards I54 being braced by the inclined and horizontal members I55. Secured to each of the upper horizontal members I55 is a bearing block I56, the respective bearings in these blocks being horizontally alined.

Secured to the respective inclined members I 55 are the horizontally extending rods I51 which are transversely braced by a horizontal member I58. Extending vertically from the rods I51 and the member I58 are the members I59 which are transversely braced by a member I50 to thereby support a curtain reflector I6I utilizable as hereinafter described. The rods I51, the member I58 and the members I58 are connected together by lower brackets I56a, Fig. 1, which are adjustably mounted on the rods I 51.

Referring to Figs. 1, 2, 26 and 27, I have shown an open frame I62 of oblong. rectangular configuration, this frame I62 being braced by the upper and lower members I63 together with the intermediate members I 64, Fig. l. Secured to the intermediate members I 64 are the parallel members I65 provided, respectively, with trunnions I68 disposed in horizontal alinement, said trunnions I66 being received, respectively, in the aforesaid bearings formed in therespective blocks I56.

As will be understood, the frame I62 is adapt ed for pivotal movement in the trunnion bearings described above and, during such pivotal movement, the frame I62 together with the parts carried thereby are moved counter-clockwise, Fig. 1, from vertical to horizontal position, Fig. 2, and vice versa. For cushioning purposes, suitable shock-absorbing mechanism may be provided to decreue the rate of movement of said frame I52 as it approaches either horizontal or vertical position.

To this end and as shown in Fig. l, the springcontain'ing ends of a pair of airplane-type shock absorber I51 are pivoted to the upper ends of the respective members I65. The stop-carrying members I61a of the respective shock absorbers I61 extendfreely through passages providedtherefor, respectively, in a horizontal member I68 suitably secured to the lower horizontal members I55 of the carriage CI. When the frame I62 is moved counter-clockwise from the position shown in Fig. 1, the members I61a move therewith until the stops carried, respectively. thereby engage the member I68 whereupon relative movement of each spring-containing end of each shock absorber occurs with respect to each stop-carrying member thereof. This causes movement of said frame I62 to be decelerated as it approaches its horizontal position.

Further, for shock-absorbing purposes, a pair of shock absorbers I69 are horizontally secured in suitable manner to the lower part of the carriage CI, the respective, spring-controlled movable elements thereof projecting forwardly beyond said carriage. When the frame IE2 is moved from horizontal to vertical position, the lower part thereof engages these movable elements and moves them against spring pressure to their retracted positions whereby movement of said frame I62 is decelerated as it approaches its vertical position.

Referring particularly to Figs. 1, 26 and 2'1, the hereinbefore described open frame I62 of oblong, rectangular configuration is shown as having angle configuration when viewed in section. Co acta-ble with the frame I52 is a similar open frame I10 and these. two frames are pivoted together at I11. The lower surface of the frame I10, Fig. 27, has pocket-forming members I12 secured thereto which support a transparent plate I13 such, for example, as a sheet of glass. the plate I13, then, closing thev opening defined by the frame I10.

The inner edge of the frame I52, throughout the periphery thereof, supports a plurality of spaced sleeves I18 which, in freely slidable relation. receive the respective members I15. Each of the hereinbefore described parallel members I65 supports a plurality of spaced sleeves I16 which, in freely slidable relation, receive the respective members I11. Secured to the upper ends of the members I15 and I11, Fig. 2'1, is a plate I18 and below this plate, each of the members I15 and I11 carries a helical spring I19 whereby said plate I18 is biased in an upward direction, Fi

The plate I16, between the pairs of members I68 and I65, lsprovided with an aperture I having oblong. rectangular configuration, this aperture, at opposite sides thereof, being bordered by a pair of parallel members I8I, Fig. '30, secured in suitable manner to the surfaces of said plate I18. Carried by themembers I8I are the respective track members I82 which carry upper and lower supporting bars I88 and 184,, the bar I83 being spring-controlled so that it .remainsin a desired position and the bar I84 being provided with spring-controlled latching members I85 adapted to be releasably associated with serra tions formed in the members I82 whereby said bar I84 may be positively retained in a desired position. Secured tothe bars I83 and I84 are the re spective strips I86 which overhang the facing surfaces of said bars I83 and I84 as indicated in Fig. 29.

In accordance with the invention, the aforesaid aperture I88 of the plate I18 is adapted to be closed by a filler plate I81 which may he reinforced on its rear surface by a pluralityof angle irons I81a. One pair of opposite sides of the filler plate I81 has the strips I88 secured thereto, respectively, while the other pair of opposite sides of said filler plate I81 has the angle irons I89 secured thereto, respectively.

With the bars I83, I88 in their respective upper and lower positions as indicated in Fig. 29, the filler plate I81 is adapted to be disposed in and close the aforesaid aperture I80. When thus positioned, the strips I88 of the filler plate I81 rest on the respective track members I82 and the filler plate angle irons I89 rest on the respective strips I86. When thus positioned, the outer surface of the filler plate I 81 is flush with the outer surface of the plate I18.

With the filler plate I81 positioned in the aperture I80 as described above, a mat I90 formed from rubber, or equivalent, and preferably conforming in configuration with the plate I18 may be positioned on the latter as indicated in Fig. 27. Secured to the mat I90, at the periphery thereof. is an endless sealing strip I9I formed from rubher, or equivalent, with which the hereinbefore 

